react-native/website/core/Marked.js

/**
 * marked - a markdown parser
 * https://github.com/chjj/marked
 *
 * @copyright 2011-2013 Christopher Jeffrey. MIT License.
 * @providesModule Marked
 * @noflow
 */

/* eslint-disable */

'use strict';

var Header = require('Header');
var Prism = require('Prism');
var React = require('React');
var WebPlayer = require('WebPlayer');
var SnackPlayer = require('SnackPlayer');

/**
 * Block-Level Grammar
 */

var block = {
  newline: /^\n+/,
  code: /^( {4}[^\n]+\n*)+/,
  fences: noop,
  hr: /^( *[-*_]){3,} *(?:\n+|$)/,
  heading: /^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,
  nptable: noop,
  lheading: /^([^\n]+)\n *(=|-){3,} *\n*/,
  blockquote: /^( *>[^\n]+(\n[^\n]+)*\n*)+/,
  list: /^( *)(bull) [\s\S]+?(?:hr|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
  html: /^ *(?:comment|closed|closing) *(?:\n{2,}|\s*$)/,
  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +["(]([^\n]+)[")])? *(?:\n+|$)/,
  table: noop,
  paragraph: /^((?:[^\n]+\n?(?!hr|heading|lheading|blockquote|tag|def))+)\n*/,
  text: /^[^\n]+/,
};

block.bullet = /(?:[*+-]|\d+\.)/;
block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
block.item = replace(block.item, 'gm')(
  /bull/g,
  block.bullet
)();

block.list = replace(block.list)(/bull/g, block.bullet)(
  'hr',
  /\n+(?=(?: *[-*_]){3,} *(?:\n+|$))/
)();

block._tag = '(?!(?:' +
  'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code' +
  '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo' +
  '|span|br|wbr|ins|del|img)\\b)\\w+(?!:/|@)\\b';

block.html = replace(block.html)(
  'comment',
  /<!--[\s\S]*?-->/
)('closed', /<(tag)[\s\S]+?<\/\1>/)(
  'closing',
  /<tag(?:"[^"]*"|'[^']*'|[^'">])*?>/
)(/tag/g, block._tag)();

block.paragraph = replace(block.paragraph)('hr', block.hr)(
  'heading',
  block.heading
)('lheading', block.lheading)(
  'blockquote',
  block.blockquote
)('tag', '<' + block._tag)('def', block.def)();

/**
 * Normal Block Grammar
 */

block.normal = merge({}, block);

/**
 * GFM Block Grammar
 */

block.gfm = merge({}, block.normal, {
  fences: /^ *(`{3,}|~{3,}) *(\S+)? *\n([\s\S]+?)\s*\1 *(?:\n+|$)/,
  paragraph: /^/,
});

block.gfm.paragraph = replace(block.paragraph)(
  '(?!',
  '(?!' +
    block.gfm.fences.source.replace('\\1', '\\2') +
    '|'
)();

/**
 * GFM + Tables Block Grammar
 */

block.tables = merge({}, block.gfm, {
  nptable: /^ *(\S.*\|.*)\n *([-:]+ *\|[-| :]*)\n((?:.*\|.*(?:\n|$))*)\n*/,
  table: /^ *\|(.+)\n *\|( *[-:]+[-| :]*)\n((?: *\|.*(?:\n|$))*)\n*/,
});

/**
 * Block Lexer
 */

function Lexer(options) {
  this.tokens = [];
  this.tokens.links = {};
  this.options = options || marked.defaults;
  this.rules = block.normal;

  if (this.options.gfm) {
    if (this.options.tables) {
      this.rules = block.tables;
    } else {
      this.rules = block.gfm;
    }
  }
}

/**
 * Expose Block Rules
 */

Lexer.rules = block;

/**
 * Static Lex Method
 */

Lexer.lex = function(src, options) {
  var lexer = new Lexer(options);
  return lexer.lex(src);
};

/**
 * Preprocessing
 */

Lexer.prototype.lex = function(src) {
  src = src
    .replace(/\r\n|\r/g, '\n')
    .replace(/\t/g, '    ')
    .replace(/\u00a0/g, ' ')
    .replace(/\u2424/g, '\n');

  return this.token(src, true);
};

/**
 * Lexing
 */

Lexer.prototype.token = function(src, top) {
  var src = src.replace(/^ +$/gm, ''),
    next,
    loose,
    cap,
    bull,
    b,
    item,
    space,
    i,
    l;

  while (src) {
    // newline
    if ((cap = this.rules.newline.exec(src))) {
      src = src.substring(cap[0].length);
      if (cap[0].length > 1) {
        this.tokens.push({
          type: 'space',
        });
      }
    }

    // code
    if ((cap = this.rules.code.exec(src))) {
      src = src.substring(cap[0].length);
      cap = cap[0].replace(/^ {4}/gm, '');
      this.tokens.push({
        type: 'code',
        text: !this.options.pedantic
          ? cap.replace(/\n+$/, '')
          : cap,
      });
      continue;
    }

    // fences (gfm)
    if ((cap = this.rules.fences.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'code',
        lang: cap[2],
        text: cap[3],
      });
      continue;
    }

    // heading
    if ((cap = this.rules.heading.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'heading',
        depth: cap[1].length,
        text: cap[2],
      });
      continue;
    }

    // table no leading pipe (gfm)
    if (top && (cap = this.rules.nptable.exec(src))) {
      src = src.substring(cap[0].length);

      item = {
        type: 'table',
        header: cap[1]
          .replace(/^ *| *\| *$/g, '')
          .split(/ *\| */),
        align: cap[2]
          .replace(/^ *|\| *$/g, '')
          .split(/ *\| */),
        cells: cap[3].replace(/\n$/, '').split('\n'),
      };

      for (i = 0; i < item.align.length; i++) {
        if (/^ *-+: *$/.test(item.align[i])) {
          item.align[i] = 'right';
        } else if (/^ *:-+: *$/.test(item.align[i])) {
          item.align[i] = 'center';
        } else if (/^ *:-+ *$/.test(item.align[i])) {
          item.align[i] = 'left';
        } else {
          item.align[i] = null;
        }
      }

      for (i = 0; i < item.cells.length; i++) {
        item.cells[i] = item.cells[i].split(/ *\| */);
      }

      this.tokens.push(item);

      continue;
    }

    // lheading
    if ((cap = this.rules.lheading.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'heading',
        depth: cap[2] === '=' ? 1 : 2,
        text: cap[1],
      });
      continue;
    }

    // hr
    if ((cap = this.rules.hr.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'hr',
      });
      continue;
    }

    // blockquote
    if ((cap = this.rules.blockquote.exec(src))) {
      src = src.substring(cap[0].length);

      this.tokens.push({
        type: 'blockquote_start',
      });

      cap = cap[0].replace(/^ *> ?/gm, '');

      // Pass `top` to keep the current
      // "toplevel" state. This is exactly
      // how markdown.pl works.
      this.token(cap, top);

      this.tokens.push({
        type: 'blockquote_end',
      });

      continue;
    }

    // list
    if ((cap = this.rules.list.exec(src))) {
      src = src.substring(cap[0].length);
      bull = cap[2];

      this.tokens.push({
        type: 'list_start',
        ordered: bull.length > 1,
      });

      // Get each top-level item.
      cap = cap[0].match(this.rules.item);

      next = false;
      l = cap.length;
      i = 0;

      for (; i < l; i++) {
        item = cap[i];

        // Remove the list item's bullet
        // so it is seen as the next token.
        space = item.length;
        item = item.replace(/^ *([*+-]|\d+\.) +/, '');

        // Outdent whatever the
        // list item contains. Hacky.
        if (~item.indexOf('\n ')) {
          space -= item.length;
          item = !this.options.pedantic
            ? item.replace(
                new RegExp('^ {1,' + space + '}', 'gm'),
                ''
              )
            : item.replace(/^ {1,4}/gm, '');
        }

        // Determine whether the next list item belongs here.
        // Backpedal if it does not belong in this list.
        if (this.options.smartLists && i !== l - 1) {
          b = block.bullet.exec(cap[i + 1])[0];
          if (
            bull !== b && !(bull.length > 1 && b.length > 1)
          ) {
            src = cap.slice(i + 1).join('\n') + src;
            i = l - 1;
          }
        }

        // Determine whether item is loose or not.
        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
        // for discount behavior.
        loose = next || /\n\n(?!\s*$)/.test(item);
        if (i !== l - 1) {
          next = item[item.length - 1] === '\n';
          if (!loose) loose = next;
        }

        this.tokens.push({
          type: loose
            ? 'loose_item_start'
            : 'list_item_start',
        });

        // Recurse.
        this.token(item, false);

        this.tokens.push({
          type: 'list_item_end',
        });
      }

      this.tokens.push({
        type: 'list_end',
      });

      continue;
    }

    // html
    if ((cap = this.rules.html.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: this.options.sanitize ? 'paragraph' : 'html',
        pre: cap[1] === 'pre',
        text: cap[0],
      });
      continue;
    }

    // def
    if (top && (cap = this.rules.def.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.links[cap[1].toLowerCase()] = {
        href: cap[2],
        title: cap[3],
      };
      continue;
    }

    // table (gfm)
    if (top && (cap = this.rules.table.exec(src))) {
      src = src.substring(cap[0].length);

      item = {
        type: 'table',
        header: cap[1]
          .replace(/^ *| *\| *$/g, '')
          .split(/ *\| */),
        align: cap[2]
          .replace(/^ *|\| *$/g, '')
          .split(/ *\| */),
        cells: cap[3]
          .replace(/(?: *\| *)?\n$/, '')
          .split('\n'),
      };

      for (i = 0; i < item.align.length; i++) {
        if (/^ *-+: *$/.test(item.align[i])) {
          item.align[i] = 'right';
        } else if (/^ *:-+: *$/.test(item.align[i])) {
          item.align[i] = 'center';
        } else if (/^ *:-+ *$/.test(item.align[i])) {
          item.align[i] = 'left';
        } else {
          item.align[i] = null;
        }
      }

      for (i = 0; i < item.cells.length; i++) {
        item.cells[i] = item.cells[i]
          .replace(/^ *\| *| *\| *$/g, '')
          .split(/ *\| */);
      }

      this.tokens.push(item);

      continue;
    }

    // top-level paragraph
    if (top && (cap = this.rules.paragraph.exec(src))) {
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'paragraph',
        text: cap[1][cap[1].length - 1] === '\n'
          ? cap[1].slice(0, -1)
          : cap[1],
      });
      continue;
    }

    // text
    if ((cap = this.rules.text.exec(src))) {
      // Top-level should never reach here.
      src = src.substring(cap[0].length);
      this.tokens.push({
        type: 'text',
        text: cap[0],
      });
      continue;
    }

    if (src) {
      throw new Error(
        'Infinite loop on byte: ' + src.charCodeAt(0)
      );
    }
  }

  return this.tokens;
};

/**
 * Inline-Level Grammar
 */

var inline = {
  escape: /^\\([\\`*{}\[\]()#+\-.!_>])/,
  autolink: /^<([^ >]+(@|:\/)[^ >]+)>/,
  url: noop,
  tag: /^<!--[\s\S]*?-->|^<\/?\w+(?:"[^"]*"|'[^']*'|[^'">])*?>/,
  link: /^!?\[(inside)\]\(href\)/,
  reflink: /^!?\[(inside)\]\s*\[([^\]]*)\]/,
  nolink: /^!?\[((?:\[[^\]]*\]|[^\[\]])*)\]/,
  strong: /^__([\s\S]+?)__(?!_)|^\*\*([\s\S]+?)\*\*(?!\*)/,
  em: /^\b_((?:__|[\s\S])+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
  code: /^(`+)\s*([\s\S]*?[^`])\s*\1(?!`)/,
  br: /^ {2,}\n(?!\s*$)/,
  del: noop,
  text: /^[\s\S]+?(?=[\\<!\[_*`]| {2,}\n|$)/,
};

inline._inside = /(?:\[[^\]]*\]|[^\]]|\](?=[^\[]*\]))*/;
inline._href = /\s*<?([^\s]*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;

inline.link = replace(inline.link)(
  'inside',
  inline._inside
)('href', inline._href)();

inline.reflink = replace(inline.reflink)(
  'inside',
  inline._inside
)();

/**
 * Normal Inline Grammar
 */

inline.normal = merge({}, inline);

/**
 * Pedantic Inline Grammar
 */

inline.pedantic = merge({}, inline.normal, {
  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
});

/**
 * GFM Inline Grammar
 */

inline.gfm = merge({}, inline.normal, {
  escape: replace(inline.escape)('])', '~|])')(),
  url: /^(https?:\/\/[^\s<]+[^<.,:;"')\]\s])/,
  del: /^~~(?=\S)([\s\S]*?\S)~~/,
  text: replace(inline.text)(']|', '~]|')(
    '|',
    '|https?://|'
  )(),
});

/**
 * GFM + Line Breaks Inline Grammar
 */

inline.breaks = merge({}, inline.gfm, {
  br: replace(inline.br)('{2,}', '*')(),
  text: replace(inline.gfm.text)('{2,}', '*')(),
});

/**
 * Inline Lexer & Compiler
 */

function InlineLexer(links, options) {
  this.options = options || marked.defaults;
  this.links = links;
  this.rules = inline.normal;

  if (!this.links) {
    throw new Error(
      'Tokens array requires a `links` property.'
    );
  }

  if (this.options.gfm) {
    if (this.options.breaks) {
      this.rules = inline.breaks;
    } else {
      this.rules = inline.gfm;
    }
  } else if (this.options.pedantic) {
    this.rules = inline.pedantic;
  }
}

/**
 * Expose Inline Rules
 */

InlineLexer.rules = inline;

/**
 * Static Lexing/Compiling Method
 */

InlineLexer.output = function(src, links, options) {
  var inline = new InlineLexer(links, options);
  return inline.output(src);
};

/**
 * Lexing/Compiling
 */

InlineLexer.prototype.output = function(src) {
  var out = [], link, text, href, cap;

  while (src) {
    // escape
    if ((cap = this.rules.escape.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(cap[1]);
      continue;
    }

    // autolink
    if ((cap = this.rules.autolink.exec(src))) {
      src = src.substring(cap[0].length);
      if (cap[2] === '@') {
        text = cap[1][6] === ':'
          ? cap[1].substring(7)
          : cap[1];
        href = 'mailto:' + text;
      } else {
        text = cap[1];
        href = text;
      }
      out.push(
        React.DOM.a({ href: this.sanitizeUrl(href) }, text)
      );
      continue;
    }

    // url (gfm)
    if ((cap = this.rules.url.exec(src))) {
      src = src.substring(cap[0].length);
      text = cap[1];
      href = text;
      out.push(
        React.DOM.a({ href: this.sanitizeUrl(href) }, text)
      );
      continue;
    }

    // tag
    if ((cap = this.rules.tag.exec(src))) {
      src = src.substring(cap[0].length);

      var color = cap[0].match('<color ([^ ]+) />');
      if (color) {
        out.push(
          React.DOM.span({
            className: 'color',
            style: { backgroundColor: color[1] },
          })
        );
        continue;
      }

      // TODO(alpert): Don't escape if sanitize is false
      out.push(cap[0]);
      continue;
    }

    // link
    if ((cap = this.rules.link.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(
        this.outputLink(cap, {
          href: cap[2],
          title: cap[3],
        })
      );
      continue;
    }

    // reflink, nolink
    if (
      (cap = this.rules.reflink.exec(src)) ||
      (cap = this.rules.nolink.exec(src))
    ) {
      src = src.substring(cap[0].length);
      link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
      link = this.links[link.toLowerCase()];
      if (!link || !link.href) {
        out.push.apply(out, this.output(cap[0][0]));
        src = cap[0].substring(1) + src;
        continue;
      }
      out.push(this.outputLink(cap, link));
      continue;
    }

    // strong
    if ((cap = this.rules.strong.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(
        React.DOM.strong(
          null,
          this.output(cap[2] || cap[1])
        )
      );
      continue;
    }

    // em
    if ((cap = this.rules.em.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(
        React.DOM.em(null, this.output(cap[2] || cap[1]))
      );
      continue;
    }

    // code
    if ((cap = this.rules.code.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(React.DOM.code(null, cap[2]));
      continue;
    }

    // br
    if ((cap = this.rules.br.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(React.DOM.br(null, null));
      continue;
    }

    // del (gfm)
    if ((cap = this.rules.del.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(React.DOM.del(null, this.output(cap[1])));
      continue;
    }

    // text
    if ((cap = this.rules.text.exec(src))) {
      src = src.substring(cap[0].length);
      out.push(this.smartypants(cap[0]));
      continue;
    }

    if (src) {
      throw new Error(
        'Infinite loop on byte: ' + src.charCodeAt(0)
      );
    }
  }

  return out;
};

/**
 * Sanitize a URL for a link or image
 */

InlineLexer.prototype.sanitizeUrl = function(url) {
  if (this.options.sanitize) {
    try {
      var prot = decodeURIComponent(url)
        .replace(/[^A-Za-z0-9:]/g, '')
        .toLowerCase();
      if (prot.indexOf('javascript:') === 0) {
        return '#';
      }
    } catch (e) {
      return '#';
    }
  }
  return url;
};

/**
 * Compile Link
 */

InlineLexer.prototype.outputLink = function(cap, link) {
  if (cap[0][0] !== '!') {
    var shouldOpenInNewWindow = link.href.charAt(0) !==
      '/' && link.href.charAt(0) !== '#';

    return React.DOM.a(
      {
        href: this.sanitizeUrl(link.href),
        title: link.title,
        target: shouldOpenInNewWindow ? '_blank' : '',
      },
      this.output(cap[1])
    );
  } else {
    return React.DOM.img(
      {
        src: this.sanitizeUrl(link.href),
        alt: cap[1],
        title: link.title,
      },
      null
    );
  }
};

/**
 * Smartypants Transformations
 */

InlineLexer.prototype.smartypants = function(text) {
  if (!this.options.smartypants) return text;
  return text
    .replace(/--/g, '\u2014')
    .replace(/'([^']*)'/g, '\u2018$1\u2019')
    .replace(/"([^"]*)"/g, '\u201C$1\u201D')
    .replace(/\.{3}/g, '\u2026');
};

/**
 * Parsing & Compiling
 */

function Parser(options) {
  this.tokens = [];
  this.token = null;
  this.options = options || marked.defaults;
}

/**
 * Static Parse Method
 */

Parser.parse = function(src, options) {
  var parser = new Parser(options);
  return parser.parse(src);
};

/**
 * Parse Loop
 */

Parser.prototype.parse = function(src) {
  this.inline = new InlineLexer(src.links, this.options);
  this.tokens = src.reverse();

  var out = [];
  while (this.next()) {
    out.push(this.tok());
  }

  return out;
};

/**
 * Next Token
 */

Parser.prototype.next = function() {
  return (this.token = this.tokens.pop());
};

/**
 * Preview Next Token
 */

Parser.prototype.peek = function() {
  return this.tokens[this.tokens.length - 1] || 0;
};

/**
 * Parse Text Tokens
 */

Parser.prototype.parseText = function() {
  var body = this.token.text;

  while (this.peek().type === 'text') {
    body += '\n' + this.next().text;
  }

  return this.inline.output(body);
};

/**
 * Parse Current Token
 */

Parser.prototype.tok = function() {
  switch (this.token.type) {
    case 'space': {
      return [];
    }
    case 'hr': {
      return React.DOM.hr(null, null);
    }
    case 'heading': {
      return (
        <Header
          level={this.token.depth}
          toSlug={this.token.text}
        >
          {this.inline.output(this.token.text)}
        </Header>
      );
    }
    case 'code': {
      var lang = this.token.lang, text = this.token.text;

      if (
        lang && lang.indexOf('ReactNativeWebPlayer') === 0
      ) {
        return (
          <WebPlayer params={lang.split('?')[1]}>
            {text}
          </WebPlayer>
        );
      }

      if (lang && lang.indexOf('SnackPlayer') === 0) {
        return (
          <SnackPlayer params={lang.split('?')[1]}>
            {text}
          </SnackPlayer>
        );
      }

      if (lang) {
        return <Prism language={lang}>{text}</Prism>;
      }

      return <Prism>{text}</Prism>;
    }
    case 'table': {
      var table = [],
        body = [],
        row = [],
        heading,
        i,
        cells,
        j;

      // header
      for (i = 0; i < this.token.header.length; i++) {
        heading = this.inline.output(this.token.header[i]);
        row.push(
          React.DOM.th(
            this.token.align[i]
              ? {
                  style: { textAlign: this.token.align[i] },
                }
              : null,
            heading
          )
        );
      }
      table.push(
        React.DOM.thead(null, React.DOM.tr(null, row))
      );

      // body
      for (i = 0; i < this.token.cells.length; i++) {
        row = [];
        cells = this.token.cells[i];
        for (j = 0; j < cells.length; j++) {
          row.push(
            React.DOM.td(
              this.token.align[j]
                ? {
                    style: {
                      textAlign: this.token.align[j],
                    },
                  }
                : null,
              this.inline.output(cells[j])
            )
          );
        }
        body.push(React.DOM.tr(null, row));
      }
      table.push(React.DOM.thead(null, body));

      return React.DOM.table(null, table);
    }
    case 'blockquote_start': {
      var body = [];

      while (this.next().type !== 'blockquote_end') {
        body.push(this.tok());
      }

      return React.DOM.blockquote(null, body);
    }
    case 'list_start': {
      var type = this.token.ordered ? 'ol' : 'ul',
        body = [];

      while (this.next().type !== 'list_end') {
        body.push(this.tok());
      }

      return React.DOM[type](null, body);
    }
    case 'list_item_start': {
      var body = [];

      while (this.next().type !== 'list_item_end') {
        body.push(
          this.token.type === 'text'
            ? this.parseText()
            : this.tok()
        );
      }

      return React.DOM.li(null, body);
    }
    case 'loose_item_start': {
      var body = [];

      while (this.next().type !== 'list_item_end') {
        body.push(this.tok());
      }

      return React.DOM.li(null, body);
    }
    case 'html': {
      return !this.token.pre && !this.options.pedantic
        ? React.DOM.span({
            dangerouslySetInnerHTML: {
              __html: this.token.text,
            },
          })
        : this.token.text;
    }
    case 'paragraph': {
      return this.options.paragraphFn
        ? this.options.paragraphFn.call(
            null,
            this.inline.output(this.token.text)
          )
        : React.DOM.p(
            null,
            this.inline.output(this.token.text)
          );
    }
    case 'text': {
      return this.options.paragraphFn
        ? this.options.paragraphFn.call(
            null,
            this.parseText()
          )
        : React.DOM.p(null, this.parseText());
    }
  }
};

/**
 * Helpers
 */

function escape(html, encode) {
  return html
    .replace(!encode ? /&(?!#?\w+;)/g : /&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

function replace(regex, opt) {
  regex = regex.source;
  opt = opt || '';
  return function self(name, val) {
    if (!name) return new RegExp(regex, opt);
    val = val.source || val;
    val = val.replace(/(^|[^\[])\^/g, '$1');
    regex = regex.replace(name, val);
    return self;
  };
}

function noop() {}
noop.exec = noop;

function merge(obj) {
  var i = 1, target, key;

  for (; i < arguments.length; i++) {
    target = arguments[i];
    for (key in target) {
      if (
        Object.prototype.hasOwnProperty.call(target, key)
      ) {
        obj[key] = target[key];
      }
    }
  }

  return obj;
}

/**
 * Marked
 */

function marked(src, opt, callback) {
  if (callback || typeof opt === 'function') {
    if (!callback) {
      callback = opt;
      opt = null;
    }

    if (opt) opt = merge({}, marked.defaults, opt);

    var highlight = opt.highlight, tokens, pending, i = 0;

    try {
      tokens = Lexer.lex(src, opt);
    } catch (e) {
      return callback(e);
    }

    pending = tokens.length;

    var done = function(hi) {
      var out, err;

      if (hi !== true) {
        delete opt.highlight;
      }

      try {
        out = Parser.parse(tokens, opt);
      } catch (e) {
        err = e;
      }

      opt.highlight = highlight;

      return err ? callback(err) : callback(null, out);
    };

    if (!highlight || highlight.length < 3) {
      return done(true);
    }

    if (!pending) return done();

    for (; i < tokens.length; i++) {
      (function(token) {
        if (token.type !== 'code') {
          return --pending || done();
        }
        return highlight(
          token.text,
          token.lang,
          function(err, code) {
            if (code == null || code === token.text) {
              return --pending || done();
            }
            token.text = code;
            token.escaped = true;
            --pending || done();
          }
        );
      })(tokens[i]);
    }

    return;
  }
  try {
    if (opt) opt = merge({}, marked.defaults, opt);
    return Parser.parse(Lexer.lex(src, opt), opt);
  } catch (e) {
    e.message += '\nPlease report this to https://github.com/chjj/marked.';
    if ((opt || marked.defaults).silent) {
      return [
        React.DOM.p(null, 'An error occurred:'),
        React.DOM.pre(null, e.message),
      ];
    }
    throw e;
  }
}

/**
 * Options
 */

marked.options = (marked.setOptions = function(opt) {
  merge(marked.defaults, opt);
  return marked;
});

marked.defaults = {
  gfm: true,
  tables: true,
  breaks: false,
  pedantic: false,
  sanitize: false,
  smartLists: false,
  silent: false,
  highlight: null,
  langPrefix: 'lang-',
  smartypants: false,
  paragraphFn: null,
};

/**
 * Expose
 */

marked.Parser = Parser;
marked.parser = Parser.parse;

marked.Lexer = Lexer;
marked.lexer = Lexer.lex;

marked.InlineLexer = InlineLexer;
marked.inlineLexer = InlineLexer.output;

marked.parse = marked;

var Marked = React.createClass({
  render: function() {
    return this.props.children
      ? React.DOM.div(
          null,
          marked(this.props.children, this.props)
        )
      : null;
  },
});

module.exports = Marked;